锥形束CT在牙周影像学检查中的应用研究初探

The study of cone beam computed tomography applications in periodontal imaging

目的探索运用锥形束CT(CBCT)对牙周软硬组织进行无创性测量分析的方法并评价其可行性与可靠性。方法运用CBCT对4名健康人的48颗牙的牙周软硬组织相关参数进行测量,并将其与常规探针测量龈缘-釉牙骨质界(GM-CEJ)的结果进行比较。结果同一观测者对牙龈缘-牙槽骨嵴顶、GM-CEJ、釉牙骨质界-牙槽骨嵴顶距离重复测量的结果均无统计学差异;不同观测者对牙龈缘-牙槽骨嵴顶、GM-CEJ、釉牙骨质界-牙槽骨嵴顶距离测量的结果均无统计学差异;牙周探诊测量和CBCT测量GM-CEJ距离的差异有统计学意义,但差异远小于探诊测量的最小精度。结论 CBCT是一种可重复性的牙周组织无创性检查与测量方法,具有良好可行性,可靠性高。

Objective The aim of the study was to evaluate and support clinical application in periodontal disease of cone beam computed tomography（CBCT）. Methods This study involved 4 patients with healthy periodontium who took the CBCT examination and compared with directly probing mesurement. Results The distance from gingival margin to alveolar crest, from gingival margin to cemento-enamal junction（GM-CEJ）, from CEJ to alveolar crest mesured twice by the same observer which showed no statistical differences; the distance between gingival margin and alveolar crest, GMCEJ, CEJ and alveolar crest was mesured by two different observer which showed no statistical differences. The distances from GM-CEJ measured by CBCT were less than direct probing measurement, but the average difference was far more less than the minimum precision of the probe. Conclusion Periodontal measurement method by CBCT is practicable and repeatable and it is relatively precise to measure periodontal tissue by CBCT.